Model Comparison

Muse Spark 1.1 vs Kimi K3Which is better in 2026?

Muse Spark 1.1 has a slight edge in benchmark performance.

Verdict: Muse Spark 1.1 vs Kimi K3 — which is better?

Muse Spark 1.1 (by Meta) and Kimi K3 (by Moonshot AI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Muse Spark 1.1 outperforms in 4 benchmarks (Humanity's Last Exam, Job Bench, MCP Atlas, Toolathlon), while Kimi K3 is better at 3 benchmarks (BabyVision, CharXiv-R, Terminal-Bench 2.1). Muse Spark 1.1 has a slight edge in benchmark performance.

Choose Muse Spark 1.1 if…

  • you want the strongest raw capability — it leads on 4 of 7 shared benchmarks

Choose Kimi K3 if…

  • you want the most recent training data — it shipped Jul 2026

Performance Benchmarks

Comparative analysis across standard metrics

7 benchmarks

Muse Spark 1.1 outperforms in 4 benchmarks (Humanity's Last Exam, Job Bench, MCP Atlas, Toolathlon), while Kimi K3 is better at 3 benchmarks (BabyVision, CharXiv-R, Terminal-Bench 2.1).

Muse Spark 1.1 has a slight edge in benchmark performance.

Fri Jul 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Kimi K3 specifies input context (1,048,576 tokens). Only Kimi K3 specifies output context (1,048,576 tokens).

Meta
Muse Spark 1.1
Input- tokens
Output- tokens
Moonshot AI
Kimi K3
Input1,048,576 tokens
Output1,048,576 tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Muse Spark 1.1 and Kimi K3 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Muse Spark 1.1

Text
Images
Audio
Video

Kimi K3

Text
Images
Audio
Video

Release Timeline

When each model was launched

Muse Spark 1.1 was released on 2026-07-09, while Kimi K3 was released on 2026-07-16.

Kimi K3 is 0 month newer than Muse Spark 1.1.

Muse Spark 1.1

Jul 9, 2026

1 weeks ago

Kimi K3

Jul 16, 2026

1 days ago

1w newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Meta
Higher Humanity's Last Exam score (62.1% vs 56.0%)
Higher Job Bench score (54.7% vs 52.9%)
Higher MCP Atlas score (88.1% vs 84.2%)
Higher Toolathlon score (75.6% vs 73.2%)
Moonshot AI
Larger context window (1,048,576 tokens)
Has open weights
Higher BabyVision score (85.7% vs 76.3%)
Higher CharXiv-R score (91.3% vs 88.4%)
Higher Terminal-Bench 2.1 score (88.3% vs 80.0%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Muse Spark 1.1 and Kimi K3 side-by-side, then vote on the output you prefer.

Muse Spark 1.1
✓ Preferred
Kimi K3
Open in Playground
AI Model Comparison Table
Feature
Meta
Muse Spark 1.1
Moonshot AI
Kimi K3

FAQ

Common questions about Muse Spark 1.1 vs Kimi K3.

Which is better, Muse Spark 1.1 or Kimi K3?

Muse Spark 1.1 has a slight edge in benchmark performance. Muse Spark 1.1 is made by Meta and Kimi K3 is made by Moonshot AI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Muse Spark 1.1 compare to Kimi K3 in benchmarks?

Muse Spark 1.1 scores CharXiv-R: 88.4%, MCP Atlas: 88.1%, OSWorld-Verified: 80.8%, Terminal-Bench 2.1: 80.0%, BabyVision: 76.3%. Kimi K3 scores MathVision: 97.8%, DeepSearchQA: 95.0%, GPQA: 93.5%, CharXiv-R: 91.3%, BrowseComp: 91.2%.

What are the context window sizes for Muse Spark 1.1 and Kimi K3?

Muse Spark 1.1 supports an unknown number of tokens and Kimi K3 supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Muse Spark 1.1 and Kimi K3?

Key differences include licensing (Proprietary vs Unknown). See the full comparison above for benchmark-by-benchmark results.

Who makes Muse Spark 1.1 and Kimi K3?

Muse Spark 1.1 is developed by Meta and Kimi K3 is developed by Moonshot AI.

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